CVE-2025-49579 – starcitizentools/citizen-skin

Package

Manager: composer
Name: starcitizentools/citizen-skin
Vulnerable Version: >=2.4.2 <3.3.1

Severity

Level: Medium

CVSS v3.1: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N

CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N

EPSS: 0.00051 pctl0.15546

Details

starcitizentools/citizen-skin allows stored XSS in menu heading message ### Summary All system messages in menu headings using the Menu.mustache template are inserted as raw HTML, allowing anybody who can edit those messages to insert arbitrary HTML into the DOM. ### Details The system messages for menu headings are inserted unescaped into raw HTML: https://github.com/StarCitizenTools/mediawiki-skins-Citizen/blob/072e4365e9084e4b153eac62d3666566c06f5a49/templates/Menu.mustache#L8-L10 ### PoC 1. Go to any article using citizen with the `uselang` parameter set to `x-xss` 2. A large number of alerts will be shown for various messages, e.g.: ![image](https://github.com/user-attachments/assets/6a18ec77-d2a0-4a0d-b4aa-83359304659a) ![image](https://github.com/user-attachments/assets/eaadb8e1-58b6-41be-90d2-829c50cf75ac) On the main page of my test wiki, the following messages were shown: `navigation`, `notifications`, `user-interface-preferences`, `personaltools`, `variants`, `views`, `associated-pages`, `cactions` and `toolbox`. ### Impact This impacts wikis where a group has the `editinterface` but not the `editsitejs` user right.

Metadata

Created: 2025-06-13T14:08:31Z
Modified: 2025-06-13T14:08:31Z
Source: https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2025/06/GHSA-g3cp-pq72-hjpv/GHSA-g3cp-pq72-hjpv.json
CWE IDs: ["CWE-79"]
Alternative ID: GHSA-g3cp-pq72-hjpv
Finding: F425
Auto approve: 1